Where does “天南” come from?

天南 (Japanese) comes from Japanese 天, from Old Japanese 天, from Proto-Japonic *amay.

Ancestry of “天南”, step by step

天南 traces back through two separate lines of ancestry.

via Japanese 天

StepLanguageWordMeaning
1Japanese天the sky, the heavens; the area above a kitchen...
2Old Japanese天sky, heavens
3Proto-Japonic*amay—

via Japanese 南

StepLanguageWordMeaning
1Japanese南the south; a southerly, south wind; to go south
2Middle Chinese南—
Every word from Proto-Japonic *amay →Every word from Old Japanese 天 →Every word from Japanese 天 →